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Manually retractable bollards (lowered by a key mechanism) are found useful in some cases because they require less infrastructure. [18] The term "robotic bollards" has been applied to traffic barricades capable of moving themselves into position on a roadway. [19]
Security posts known as bollards were not in place before a suspect drove a truck into a crowd in the French Quarter of New Orleans early on New Year's Day, killing 14 and injuring at least 35.
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A retractable roof is a roof system designed to roll back the roof of a structure so that the interior of the facility is open to the outdoors. [1] Retractable roofs are sometimes referred to as operable roofs or retractable skylights. The term operable skylight, while quite similar, refers to a skylight that opens on a hinge, rather than on a ...
Due to the high levels of crime in South Africa, it is common for residential houses to have perimeter defences. The City of Johannesburg promotes the use of palisade fencing over opaque, usually brick, walls as criminals cannot hide as easily behind the fence. The City of Johannesburg manual on safety describes best practices and maintenance ...
The list of construction methods covers the processes and techniques used in the construction process. The construction method is essential for civil engineers; utilizing it appropriately can help to achieve the desired results.
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